What is the cause of the explosion of the lithium battery of Samsung mobile phones?

What is the cause of the explosion of the lithium battery of Samsung mobile phones? In the month since Samsung launched the Galaxy Note 7 in August 2016, there have been more than 30 explosions and fires around the world. Samsung blamed the lithium battery problem. In fact, not all bombs are caused by lithium battery problems, it may also be caused by some reasons. Lithium batteries are common in electronic devices, including smartphones, laptops, electric cars and even airplanes. Samsung Electronics Co., Ltd. Samsung's Galaxy Note 7 flagship smartphone suffered lithium battery overheating and explosion, prompting consumers to reconsider the safety of lithium batteries. The most common reason for the explosion of mobile phone lithium batteries is an error in the charging process. In electronic devices that use lithium batteries, the software usually sets the amount of power and charging speed the battery should be charged. If something goes wrong, it may destroy the stability of the battery compound, cause what researchers call thermal runaway, and may cause a fire or explosion. Samsung lithium battery. What is the reason for the explosion of the lithium battery of JPG Samsung mobile phone? As we all know, the lithium battery is a battery with lithium metal or lithium alloy as the negative electrode material and non-aqueous electrolyte solution. Lithium batteries do not contain metallic lithium, are rechargeable, and have the advantages of extremely low self-discharge rate and mild discharge voltage, so they are widely used in digital and electronic products. However, when a lithium battery is charged, lithium ions will gain electrons, and lithium atom crystals appear on the surface of the material, which is the same as overcharging, which can cause danger. Once the battery casing ruptures, it will explode. According to the analysis of explosion types, battery explosions can be divided into three types: external short circuit, internal short circuit and overcharge. The reason why Samsung Note7 runs out is the battery. The relatively radical industrial design of Note7 caused problems in the design and manufacturing of lithium batteries, which Samsung failed to identify and confirm in time. Specifically, the first version of the Samsung Note7 battery (SDI) was designed to cause the negative plate of the lithium battery to be squeezed, causing a short circuit and fire. The second version of the battery (ATL) was accidentally manufactured, causing the copper foil to melt. During the welding process, a burr pierced the insulating film, which directly caused a short circuit and a fire. Other batteries were found not to use insulating tape. This is consistent with the cause of the explosion previously reported by foreign media. Reason one The most common culprit is battery problems. Many people in the industry said that the Samsung lithium battery door incident was not accidental. When Samsung decided to expand the battery capacity to challenge the physical limits of lithium battery technology, the products generally chose fast charging technology to implant bad results. Therefore, when the research and development of lithium batteries has reached the limit of reality, we should think about safety issues more rationally. If only battery technology caused the explosion, it is not impossible. For two reasons, the company is eager for quick success and short-term product testing. Normally, smartphone manufacturers and mobile operators will rigorously test products before they reach consumers, although this process is important to ensure that new smartphones are compatible with wireless networks. However, with the continuous breakthrough of technology, the replacement frequency of electronic products is getting faster and faster. In order to seize the opportunity, manufacturers continue to shorten the time of the entire process of product development, processing, testing and sales. Of course, this means that users play the role of guinea pigs to a large extent. Three reasons for human error. In an increasingly competitive environment, the vast majority of manufacturers will choose price wars to improve their competitiveness, leading to the same performance of technical electronic products, usually reducing the quality of cheap products and hardware to achieve the goal, and even some bad companies use it. Toxic substances, refurbish old batteries, etc. If the product is under the premise that the hardware material cannot be guaranteed, the probability of a bomb accident is greatly increased. Lithium batteries have become popular in notebook computers, smart phones and other fields because they can store energy efficiently and release energy slowly. Lithium batteries also have positive electrodes, negative electrodes, as well as membranes and electrolytes. The negative material of early lithium batteries is simple lithium, but metal lithium is very active. Statement: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Nine ways to save laptop battery power